[dnsdist] Block Random queries

Alejandro Adroher Mellado alejandro.adroher at omniaccess.com
Wed Jun 8 13:52:49 UTC 2016

I guess they generates SERVFAIL on your recursor.
Maybe you can start from there.

I have no enough developed my environment, so I deal with that with a bash script which reads the recursor log file and takes the appropriate decision, sending to dnsdist the corresponding command.

I hope you will have luck, I also would be good for me.


From: dnsdist [mailto:dnsdist-bounces at mailman.powerdns.com] On Behalf Of Federico Olivieri
Sent: miƩrcoles, 8 de junio de 2016 14:54
To: dnsdist at mailman.powerdns.com
Subject: [dnsdist] Block Random queries

Hi everybody,

My server receives some random queries as xfz3421xc.domain.com<http://xfz3421xc.domain.com>, jh65jj3e.domain2.com<http://jh65jj3e.domain2.com>

Can someone suggests some LUA script to block these kind of random queries?


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